The Dow finished the day down by 1,032.95 points, or 4.15% at 23,849.23 — down 2,767 points, or 10.4%. A drop of 10% from its high of 26,616 on Jan. 26 is considered a correction. The S&P 500 tumbled 2.96%, erasing its gains for the year. Ten-year Treasury yields flirted with four-year highs.